Governor mechanism for compressor-engines and the like.



M. E. TEAGUE- GOVERNOR MECHANISM FOR COMPRESSOR ENGlNESiANDTHE-ILIKE.APPLICATION FILED OCT. l9, l9'l4h 1,21 1,007 Patented Jam 2,1917.

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GOVERNOR MECHANISM FOR COMPRESSOR-ENGINES AND THE LIKE.

Specification of Letters Patent.

Patented Jan. 2, 1917.

Application filed October 19, 1914. Serial No. 867,499.

To all whom it may concern Be it known that 1, Moses EDWARD Tnxcun, asubject of the King of Great Britain and Ireland, and residing at BowsonHouse, (linderford, Gloucester, in the county of Gloucester, England,have invented certain new and useful Improvements in Governor Mechanismsfor Compressor- Engines and the like, of which the following is aspecification.

This invention relates to improvements in governing mechanism forcompressor engines and the like of the type in which a combinedcentrifugal and pressure governor is employed.

The object of the present invention is to devise an improved arrangementof the above type and the invention consists in governing mechanismcomprising an expansion valve operated by a rack bar, a speed governorand a pressure governor each of which is adapted to act separately whenrequired upon the rack bar.

The invention also consists in governing mechanism of the characterabove referred to wherein the pressure governor acts upon the rack barthrough the medium of a bell crank lever while the other end of the rackbar is connected to a lGVQl loosely mounted upon a spindle which isconnected to the speed governor, means being provided for connecting theloosely mounted lever to the spindle upon which it is mounted whenrequired.

The accompanying drawings illustrate more or less diagrammatically oneconvenient arrangement of apparatus in accordance with the invention.

Figure 1 is an elevation, Fig. 2 is a plan of a portion of Fig. 1, thespeed governor being omitted, Fig. 3 is an elevation on an enlargedscale of a portion of the mechanism shown in Fig. 1, parts being ShOVSIlin section, and Fig. 4 is a detail view showing in side elevation one ofthe levers illustrated in Fig. 3.

'In carrying my invention into effect in one convenient manner as, forexample, in its application to a compressor engine I provide anysuitable form of expansion valve for controlling the point of cut-0d ofthe power medium from the engine cylinder but I prefer to employ mywell-known type of expansion valve as described in the specification ofmy prior British Patent No. 5384 of 1895, having a ported sleeve, the

any suitable toothed pinion or portion of pinion formed integral with orsecured to the rotary nut c. In con unct1on with the expansion valve Iprovide a speed governor c of any suitable form and construction and apressure governor 7 which in one convenient example may be in the formof a cylinder communicating by the port 9 with the pressure chamber ofthe compressor or with the reservoir and within which works a ram hloaded by means of weights 1', spring, or the like to any requiredextent depending upon'the pressure at which the apparatus is to operate.The two governors referred to are so combined with or connected to theexpansion valve that they may operate independently thereon whenrequired so that when, for example, the speed of the engine becomesexcessive the speed governor c operates the expansion valve in such amanner as to cut off the power medium at an earlier point in the strokewhile the pressure governor f operates in a similar manner when thepressure rises beyond a predetermined limit, the operations of the twogovernors being however entirely independent of one another.

In one convenient construction the rack bar (l is connected at one endto a link 70, one end of which engages with a rectangular or othersuitable slot in the rack bar while the other end is loosely mountedupon a shaft orspindle Z held in a bearing which may be formed in onewith or secured to the casing or framework of the expansive valve uponwhich spindle Z is rigidly secured a lever m connected by means of asuitable link or the like n to the collar or other moving part 0 of thespeed governor. The pressure governor is connected by means of a singlelink 7) to a bell crank lever q pivotally mounted upon the casing of theexpansion valve, the free end 1' of which is adapted to act whennecessary upon the end of the rack bar (1 for the purpose of varying thecut-oflf, the arrangement bemg' such that the bell crank lever q isslightly out of contact with the rack bar (1 when the pressure governoris in its normal position. The rack bar (1 being connected to a leverloosely mounted upon the spindle l is free to move under the action 'ofthe air governor independently of the s eed governor while a clutch s isprovided'for the purpose of connecting the spindle Z with the lever issothat the rack bar willbe operated to vary the cut-01f when the spindleis rotated by the governor mechanism pulhng upon the link a. Thus thespeed and pressure governor's act independently to vary the cut-ofl ofthe expansion valve while the valve itself is operated .by a chain driveand crank and con- "necting rod mechanism or by'means'of the lever -t'connected to the engine crank or eccentric by the link u, the lever tbeing mounted upon, a. spindle uupon which is rigidly mounted the leverto serving to operate the valve. The counterweight a; or its equivalentis applied to the mechanism by being fixed to a lever secured to theshaft upon which thelever k is mounted for the purpose'of bringing theexpansion valve to its normal position when the action of 'either thespeed governor or the air gov--' ernor ceases.

It is to be understood that I do not con fine my invention to thevarious details I hereinbefore given by way of example as the same maybe suitably modified depending upon the type pf expansion valve to whichthe invention 1s to beapplied and the purpose for which the apparatus isto be employed-and I suitably dispose the various parts of the mechanismin any given relation to one another depending upon the particularpractical requirements that are to l-Iaving now described my inventionwhat I claim as new and desire to secure by Letters Patent is I 1.Governor mechanism for compressor engines and the like comprising incombination an'expansion valve, a rack banadapt- 1 ed to actuate saidvalve and a speed governor and a pressure. governorceach of which isadapted to act separately and independently upon said rack bar. V

2.-Governor mechanism for compremor engines and the like comprising anexpansion valve, a rack bar actuating said valve," V

a pressure governor, a bell crank lever serving to transmit thevmovementof the pres sure governor to the rack bar, a' speed gov.-

ernorand means whereby the speed goverently of the speed governor.

abuts against one end of said' rack bar, a

ed when required.

nameto this specification in the two 'subscribingwitnesses: I

'MOSES EDWARD nor may actuate said rack bar separately and independentlyof the pressure governor.

3. Governon mechanism for compressor engines and the like comprising anexpansion valve, a rack bar adapted to actuate said valve, a speedgovernor, link mechanism whereby said speed governor may operate saidrack bar, a pressure governor and means,

whereby said pressure governor may operate said rack bar separatelyandindepend speed governor upon the rack bar independ= ent of oneanother.

5. Governor mechanism for compressor engines comprising in combinationanexpansion valve, a rack bar'adapted to actuate said valve, a pressuregovernor, a bell crank lever, one end of which is connected with saidpressure governor while the. other end speed governor, a link connected.with the other end ofsaid rack bar and loosely mounted upon aspindleconnected by link mechanism with said speed governor, and

means for connecting the loosely mounted 95 link to'the spindle uponwhichit is mounted when required.

6. Governor mechanism for compressor engines comprising in combinationan expansion valve, a rack bar adapted to-actuate lever one end of whichis'connected with said pressure governor while the other end abutsagainst one end of said rack bar, a speed governor, a link connectedwith the other 105 end of said rack. bar and loosely mounted upon aspindle connected by link mechanism with said speed governor, and clutchmechanism for connecting the loosely mounted link to the spindle uponwhich it is mount- Intestimony whereof I 'have signedmy presenee ofWitnesses:

, FRANK J. G. SLEEMAN," O. KENNETH Hum said valve, a, pressure governor,a bell crank

